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File indexing completed on 2025-09-17 08:53:37
0001 //------------------------------- -*- C++ -*- -------------------------------// 0002 // Copyright Celeritas contributors: see top-level COPYRIGHT file for details 0003 // SPDX-License-Identifier: (Apache-2.0 OR MIT) 0004 //---------------------------------------------------------------------------// 0005 //! \file celeritas/ext/GeantSetup.hh 0006 //---------------------------------------------------------------------------// 0007 #pragma once 0008 0009 #include <memory> 0010 #include <string> 0011 0012 #include "corecel/Config.hh" 0013 0014 #include "corecel/Assert.hh" 0015 0016 #include "GeantPhysicsOptions.hh" 0017 0018 // Geant4 forward declarations 0019 class G4VPhysicalVolume; 0020 class G4RunManager; 0021 0022 namespace celeritas 0023 { 0024 0025 //---------------------------------------------------------------------------// 0026 /*! 0027 * Construct a Geant 4 run manager and populate internal Geant4 physics. 0028 * 0029 * This is usually passed directly into \c GeantImporter . It hides Geant4 0030 * implementation details (including header files) from the rest of the code. 0031 * It is safe to include even when Geant4 is unavailable! 0032 * 0033 * The setup is targeted specifically for physics that Celeritas supports. 0034 */ 0035 class GeantSetup 0036 { 0037 public: 0038 //!@{ 0039 //! \name Type aliases 0040 using Options = GeantPhysicsOptions; 0041 //!@} 0042 0043 public: 0044 // Construct from a GDML file and physics options 0045 GeantSetup(std::string const& gdml_filename, Options options); 0046 0047 // Default constructor 0048 GeantSetup() = default; 0049 0050 // Terminate run on destruction 0051 ~GeantSetup(); 0052 0053 //! Prevent copying but allow moving 0054 CELER_DEFAULT_MOVE_DELETE_COPY(GeantSetup); 0055 0056 // Get the world detector volume 0057 inline G4VPhysicalVolume const* world() const; 0058 0059 //! True if we own a run manager 0060 explicit operator bool() const { return static_cast<bool>(run_manager_); } 0061 0062 private: 0063 struct RMDeleter 0064 { 0065 void operator()(G4RunManager*) const; 0066 }; 0067 using RMUniquePtr = std::unique_ptr<G4RunManager, RMDeleter>; 0068 0069 RMUniquePtr run_manager_{nullptr}; 0070 G4VPhysicalVolume* world_{nullptr}; 0071 }; 0072 0073 //---------------------------------------------------------------------------// 0074 // FREE FUNCTIONS 0075 0076 //---------------------------------------------------------------------------// 0077 // INLINE DEFINITIONS 0078 //---------------------------------------------------------------------------// 0079 /*! 0080 * Get the world detector volume. 0081 */ 0082 G4VPhysicalVolume const* GeantSetup::world() const 0083 { 0084 CELER_EXPECT(*this); 0085 return world_; 0086 } 0087 0088 #if !CELERITAS_USE_GEANT4 0089 inline GeantSetup::GeantSetup(std::string const&, Options) 0090 { 0091 CELER_NOT_CONFIGURED("Geant4"); 0092 } 0093 0094 inline GeantSetup::~GeantSetup() = default; 0095 0096 inline void GeantSetup::RMDeleter::operator()(G4RunManager*) const 0097 { 0098 CELER_ASSERT_UNREACHABLE(); 0099 } 0100 #endif 0101 0102 //---------------------------------------------------------------------------// 0103 } // namespace celeritas
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